<!DOCTYPE html>
<html>
<head>
<title>Magnifier</title>
<meta name="description" content="Use a draggable Overview as a kind of magnifying lens." />
<!-- Copyright 1998-2016 by Northwoods Software Corporation. -->
<meta charset="UTF-8">
<style type="text/css">

#myOverviewDiv {
  display: none;
  position: absolute;
  background-color: white;
  z-index: 300; /* make sure its in front */
  border: solid 1px blue;
  width:200px;
  height:200px
}

</style>
<script src="go.js"></script>
<link href="../assets/css/goSamples.css" rel="stylesheet" type="text/css" />  <!-- you don't need to use this -->
<script src="goSamples.js"></script>  <!-- this is only for the GoJS Samples framework -->
<script id="code">
  function init() {
    if (window.goSamples) goSamples();  // init for these samples -- you don't need to call this
    var $ = go.GraphObject.make;  // for conciseness in defining templates

    myDiagram =
      $(go.Diagram, "myDiagramDiv",  // the DIV HTML element
        {
          initialAutoScale: go.Diagram.Uniform,
          layout:
            $(go.TreeLayout,  // use a TreeLayout to position all of the nodes
              {
                treeStyle: go.TreeLayout.StyleLastParents,
                angle: 90,
                layerSpacing: 80,
                alternateAngle: 0,
                alternateAlignment: go.TreeLayout.AlignmentStart,
                alternateNodeIndent: 20,
                alternateNodeIndentPastParent: 1,
                alternateNodeSpacing: 20,
                alternateLayerSpacing: 40,
                alternateLayerSpacingParentOverlap: 1,
                alternatePortSpot: new go.Spot(0, 0.999, 20, 0),
                alternateChildPortSpot: go.Spot.Left
              })
        });

    // define Converters to be used for Bindings
    function theNationFlagConverter(nation) {
      return "https://www.nwoods.com/go/Flags/" + nation.toLowerCase().replace(/\s/g, "-") + "-flag.Png";
    }

    function theInfoTextConverter(info) {
      var str = "";
      if (info.title) str += "Title: " + info.title;
      if (info.headOf) str += "\n\nHead of: " + info.headOf;
      if (typeof info.boss === "number") {
        var bossinfo = myDiagram.model.findNodeDataForKey(info.boss);
        if (bossinfo !== null) {
          str += "\n\nReporting to: " + bossinfo.name;
        }
      }
      return str;
    }

    // define the Node template
    myDiagram.nodeTemplate =
      $(go.Node, "Auto",
        { isShadowed: true },
        // the outer shape for the node, surrounding the Table
        $(go.Shape, "Rectangle",
          new go.Binding("fill", "isHighlighted", function(h) { return h ? "red" : "azure"; }).ofObject()),
        // a table to contain the different parts of the node
        $(go.Panel, "Table",
          { margin: 4, maxSize: new go.Size(150, NaN) },
          // the two TextBlocks in column 0 both stretch in width
          // but align on the left side
          $(go.RowColumnDefinition,
            {
              column: 0,
              stretch: go.GraphObject.Horizontal,
              alignment: go.Spot.Left
            }),
          // the name
          $(go.TextBlock,
            {
              row: 0, column: 0,
              maxSize: new go.Size(120, NaN), margin: 2,
              font: "bold 8pt sans-serif",
              alignment: go.Spot.Top
            },
            new go.Binding("text", "name")),
          // the country flag
          $(go.Picture,
            {
              row: 0, column: 1,
              desiredSize: new go.Size(34, 26), margin: 2,
              imageStretch: go.GraphObject.Uniform,
              alignment: go.Spot.TopRight
            },
            new go.Binding("source", "nation", theNationFlagConverter)),
          // the additional textual information
          $(go.TextBlock,
            {
              row: 1, column: 0, columnSpan: 2,
              font: "8pt sans-serif"
            },
            new go.Binding("text", "", theInfoTextConverter))
        )  // end Table Panel
      );  // end Node

    // define the Link template, a simple orthogonal line
    myDiagram.linkTemplate =
      $(go.Link, go.Link.Orthogonal,
        { selectable: false },
        $(go.Shape, { stroke: '#222' } ));  // the default black link shape


    // set up the nodeDataArray, describing each person/position
    var nodeDataArray = [
      { key: 0, name: "Ban Ki-moon 반기문", nation: "South Korea", title: "Secretary-General of the United Nations", headOf: "Secretariat" },
        { key: 1, boss: 0, name: "Patricia O'Brien", nation: "Ireland", title: "Under-Secretary-General for Legal Affairs and United Nations Legal Counsel", headOf: "Office of Legal Affairs" },
          { key: 3, boss: 1, name: "Peter Taksøe-Jensen", nation: "Denmark", title: "Assistant Secretary-General for Legal Affairs" },
            { key: 9, boss: 3, name: "Other Employees" },
          { key: 4, boss: 1, name: "Maria R. Vicien - Milburn", nation: "Argentina", title: "General Legal Division Director", headOf: "General Legal Division" },
            { key: 10, boss: 4, name: "Other Employees" },
          { key: 5, boss: 1, name: "Václav Mikulka", nation: "Czech Republic", title: "Codification Division Director", headOf: "Codification Division" },
            { key: 11, boss: 5, name: "Other Employees" },
          { key: 6, boss: 1, name: "Sergei Tarassenko", nation: "Russia", title: "Division for Ocean Affairs and the Law of the Sea Director", headOf: "Division for Ocean Affairs and the Law of the Sea" },
            { key: 12, boss: 6, name: "Alexandre Tagore Medeiros de Albuquerque", nation: "Brazil", title: "Chairman of the Commission on the Limits of the Continental Shelf", headOf: "The Commission on the Limits of the Continental Shelf" },
              { key: 17, boss: 12, name: "Peter F. Croker", nation: "Ireland", title: "Chairman of the Committee on Confidentiality", headOf: "The Committee on Confidentiality" },
                { key: 31, boss: 17, name: "Michael Anselme Marc Rosette", nation: "Seychelles", title: "Vice Chairman of the Committee on Confidentiality" },
                { key: 32, boss: 17, name: "Kensaku Tamaki", nation: "Japan", title: "Vice Chairman of the Committee on Confidentiality" },
                { key: 33, boss: 17, name: "Osvaldo Pedro Astiz", nation: "Argentina", title: "Member of the Committee on Confidentiality" },
                { key: 34, boss: 17, name: "Yuri Borisovitch Kazmin", nation: "Russia", title: "Member of the Committee on Confidentiality" },
              { key: 18, boss: 12, name: "Philip Alexander Symonds", nation: "Australia", title: "Chairman of the Committee on provision of scientific and technical advice to coastal States", headOf: "Committee on provision of scientific and technical advice to coastal States"},
                { key: 35, boss: 18, name: "Emmanuel Kalngui", nation: "Cameroon", title: "Vice Chairman of the Committee on provision of scientific and technical advice to coastal States" },
                { key: 36, boss: 18, name: "Sivaramakrishnan Rajan", nation: "India", title: "Vice Chairman of the Committee on provision of scientific and technical advice to coastal States" },
                { key: 37, boss: 18, name: "Francis L. Charles", nation: "Trinidad and Tobago", title: "Member of the Committee on provision of scientific and technical advice to costal States"},
                { key: 38, boss: 18, name: "Mihai Silviu German", nation: "Romania", title: "Member of the Committee on provision of scientific and technical advice to costal States"},
              { key: 19, boss: 12, name: "Lawrence Folajimi Awosika", nation: "Nigeria", title: "Vice Chairman of the Commission on the Limits of the Continental Shelf" },
              { key: 20, boss: 12, name: "Harald Brekke", nation: "Norway", title: "Vice Chairman of the Commission on the Limits of the Continental Shelf" },
              { key: 21, boss: 12, name: "Yong-Ahn Park", nation: "South Korea", title: "Vice Chairman of the Commission on the Limits of the Continental Shelf" },
              { key: 22, boss: 12, name: "Abu Bakar Jaafar", nation: "Malaysia", title: "Chairman of the Editorial Committee", headOf: "Editorial Committee" },
              { key: 23, boss: 12, name: "Galo Carrera Hurtado", nation: "Mexico", title: "Chairman of the Training Committee", headOf: "Training Committee" },
              { key: 24, boss: 12, name: "Indurlall Fagoonee", nation: "Mauritius", title: "Member of the Commission on the Limits of the Continental Shelf" },
              { key: 25, boss: 12, name: "George Jaoshvili", nation: "Georgia", title: "Member of the Commission on the Limits of the Continental Shelf" },
              { key: 26, boss: 12, name: "Wenzhang Lu", nation: "China", title: "Member of the Commission on the Limits of the Continental Shelf" },
              { key: 27, boss: 12, name: "Isaac Owusu Orudo", nation: "Ghana", title: "Member of the Commission on the Limits of the Continental Shelf" },
              { key: 28, boss: 12, name: "Fernando Manuel Maia Pimentel", nation: "Portugal", title: "Member of the Commission on the Limits of the Continental Shelf" },
          { key: 7, boss: 1, name: "Renaud Sorieul", nation: "France", title: "International Trade Law Division Director", headOf: "International Trade Law Division" },
            { key: 13, boss: 7, name: "Other Employees" },
          { key: 8, boss: 1, name: "Annebeth Rosenboom", nation: "Netherlands", title: "Treaty Section Chief", headOf: "Treaty Section" },
            { key: 14, boss: 8, name: "Bradford Smith", nation: "United States", title: "Substantive Legal Issues Head", headOf: "Substantive Legal Issues" },
              { key: 29, boss: 14, name: "Other Employees" },
            { key: 15, boss: 8, name: "Andrei Kolomoets", nation: "Russia", title: "Technical/Legal Issues Head", headOf: "Technical/Legal Issues" },
              { key: 30, boss: 15, name: "Other Employees" },
            { key: 16, boss: 8, name: "Other Employees" },
        { key: 2, boss: 0, name: "Heads of Other Offices/Departments" }
    ];

    // create the Model with data for the tree, and assign to the Diagram
    myDiagram.model =
      $(go.TreeModel,
        { nodeParentKeyProperty: "boss",  // this property refers to the parent node data
          nodeDataArray: nodeDataArray });
  }

  var myOverview = null;

  function showMagnifier() {
    var myOverviewDiv = document.getElementById("myOverviewDiv");
    if (myOverview === null || myOverviewDiv.style.display === "none") {
      // show DIV
      myOverviewDiv.style.display = "inline";

      // create Overview
      myOverview =
        go.GraphObject.make(go.Overview, myOverviewDiv,  // the HTML DIV element for the Overview
          {
            observed: myDiagram,   // tell it which Diagram to show
            // disable normal Overview functionality to make it act as a magnifying glass:
            initialScale: 2,  // zoom in even more than normal
            autoScale: go.Diagram.None,  // don't show whole observed Diagram
            hasHorizontalScrollbar: false,  // don't show any scrollbars
            hasVerticalScrollbar: false
          });

      // disable all mouse-down tools
      myOverview.toolManager.mouseDownTools.each(function(t) { t.isEnabled = false; });

      // handle mouse moves within the Overview by redirecting the events to the myDiagram
      myOverview.doMouseMove = function() {
        var pt = myOverview.lastInput.documentPoint.copy();
        var e = myDiagram.lastInput;
        e.documentPoint = pt;
        e.viewPoint = myDiagram.transformDocToView(e.documentPoint);
        myDiagram.toolManager.doMouseMove();
      };

      // implement the magnifying glass functionality, to have the Overview show part of the Diagram where the mouse is
      myDiagram.toolManager.doMouseMove = function() {
        go.ToolManager.prototype.doMouseMove.call(myDiagram.toolManager);
        var myOverviewDiv = document.getElementById("myOverviewDiv");
        if (myOverviewDiv.style.display !== "none") {
          var e = myDiagram.lastInput;
          var osize = myOverview.viewportBounds.size;
          myOverview.position = new go.Point(e.documentPoint.x - osize.width / 2, e.documentPoint.y - osize.height / 2);
          myOverviewDiv.style.left = (e.viewPoint.x - myOverviewDiv.scrollWidth / 2) + "px";
          myOverviewDiv.style.top = (e.viewPoint.y - myOverviewDiv.scrollHeight / 2) + "px";
        }
      };
    } else {
      // hide DIV
      myOverviewDiv.style.display = "none";
    }
  }
</script>
</head>
<body onload="init()">
<div id="sample" style="position: relative;">
  <div id="myDiagramDiv" style="background-color: white; border: solid 1px black; width: 100%; height: 700px"></div>
  <div id="myOverviewDiv"></div> <!-- Styled in a <style> tag at the top of the html page -->
  <label><input type="checkbox" onclick="showMagnifier()" />Show Magnifier</label>
  <p>
    This variation of the <a href="orgChartStatic.html">Org Chart (Static)</a> sample
    uses the <a>Overview</a> diagram as a magnifying glass.
    The primary behavior of showing an observed Diagram is kept, but all other behaviors
    of the Overview are disabled.
  </p>
</div>
</body>
</html>